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Spiral point taps, also known as gun taps, are essential for creating clean, precise internal threads in various materials. Choosing the right tap ensures efficiency, extends tool life, and produces high-quality results for your projects. This guide will help you navigate the key factors in selecting the best spiral point tap for your needs.
Used to make new threads or re-thread damaged and/or jammed threads
High Speed Steel Hand Taps come in three styles: Taper Style: Starts the thread square with the workpiece. Plug Style: Generally used in thru holes. Bottom Style: Generate the thread to the bottom of the hole.
High speed steel hand taps are the most versatile taps for hand use, or for tapping under power
Hand taps are popular for use in general machine tapping or CNC tapping
Metric Spiral Point Taps: Thread size: M2 x 0.4, M2.5 x 0.45, M3 x 0.5, M3.5 x 0.6, M4 x 0.7, M5 x 0.8, M6 x 1.0; plug chamfer and right hand thread cutting. Straight flutes are ground to provide provide downward chip removal, with clear threads and sharp...
Material & Finish: 6542 (M2) high speed steel metric taps run at high speeds and generate threads quickly and efficiently, offering high hardness (HRC62-64), wear resistance, and good toughness. Titanium coating for improving wear resistance, hardness...
Applications: Thread taps are great for through-hole threads. Can be used for drilling and tapping stainless steel, aluminum, alloy steel, ordinary steel, cast iron, non-ferrous metals, hard plastics, etc. Flutes on the screw tap help to remove chips and...
Machine Tap: Suitable for drill presses, tapping machines, CNC and milling machines. Used with tapping oil to get higher quality threads and more durable taps. The point of the tap helps guide it into the hole and reduces the torque required to turn it.
[Straightforward Installation]: Spiral point taps are designed for use with manual tools (such as tap wrenches) and machine tools (such as drilling machines, milling machines, lathes and machining centres). Control the speed according to material...
[Broad Application]:Spiral point taps are suitable for through-hole threading operations. Thread taps are widely suitable for some soft metals, aluminum, alloy steel, carbon steel, cast iron, non-ferrous metals, hard plastics and various other materials...
[Reliable and Durable]: Hand taps are constructed from M2 High Speed Steel, which significantly improves toughness and wear resistance. Features a Titanium coating finish that reduces friction, these machine taps deliver superior hardness, wear...
Used to make new threads or re-thread damaged and/or jammed threads
High Speed Steel Hand Taps come in three styles: Taper Style: Starts the thread square with the workpiece. Plug Style: Generally used in thru holes. Bottom Style: Generate the thread to the bottom of the hole.
High speed steel hand taps are the most versatile taps for hand use, or for tapping under power
Hand taps are popular for use in general machine tapping or CNC tapping
Last update on 2026-10-19 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Spiral Point Taps
Understanding Spiral Point Taps
Spiral point taps are designed with a specific flute geometry that directs chips forward, away from the cutting edge. This forward chip ejection is crucial for through-hole tapping, preventing chip buildup and reducing the risk of tap breakage. They are ideal for softer materials like aluminum, brass, and mild steel, where chip evacuation is a primary concern.
Key Features to Consider
Material: High-speed steel (HSS) is common, offering good hardness and wear resistance. Cobalt HSS (HSCo) provides superior heat and abrasion resistance, making it suitable for harder metals and higher-speed operations.
Thread Size and Pitch: Ensure the tap matches the desired thread size (e.g., 1/4", M6) and pitch (e.g., 20 TPI, 1.0 mm). Coarse threads are for faster assembly, while fine threads offer greater strength and finer adjustment.
Flute Style: Spiral point taps have a characteristic pointed tip that pushes chips ahead. The helix angle of the flutes can vary; higher angles are generally better for softer, stringier materials.
Coatings: Various coatings like TiN (Titanium Nitride) or TiCN (Titanium Carbonitride) can enhance hardness, lubricity, and tool life, especially when working with abrasive or difficult-to-machine materials.
Application and Material Compatibility
The primary advantage of a spiral point tap is its suitability for through-hole applications. The forward chip flow prevents clogging in blind holes, which can lead to tap damage. Consider the hardness and machinability of the workpiece material. For softer metals, standard HSS taps are often sufficient. For harder steels, stainless steel, or alloys, opt for cobalt HSS taps, possibly with a specialized coating.
Tap Size and Measurement
Taps are designated by their nominal size and thread pitch. For inch threads, this includes the major diameter and threads per inch (TPI). For metric threads, it's the nominal diameter and the pitch in millimeters. Always confirm the correct tap size and type to avoid creating incorrect or unusable threads. A drill bit chart can help determine the appropriate pilot hole size required before tapping.
Comparison Tips
Through vs. Blind Holes: If you are threading through a workpiece, a spiral point tap is an excellent choice. For blind holes, a spiral flute tap or a standard tap might be more appropriate to manage chip removal.
Material Hardness: Match the tap material (HSS vs. HSCo) and any coatings to the hardness and type of metal you are threading.
Quantity of Work: For high-volume production, consider taps with superior wear resistance and coatings, even if they have a higher initial cost, as they will last longer and maintain accuracy.
Frequently Asked Questions
What is the main advantage of a spiral point tap?
The primary advantage is its ability to eject chips forward, away from the cutting edge. This makes it ideal for through-hole applications, preventing chip buildup and reducing the risk of tap breakage.
Can spiral point taps be used for blind holes?
While primarily designed for through holes, they can sometimes be used in blind holes if sufficient chip clearance can be maintained. However, for most blind hole applications, spiral flute or standard taps are generally preferred.
What is the difference between HSS and HSCo taps?
HSS (High-Speed Steel) taps are standard and suitable for many common metals. HSCo (High-Speed Steel Cobalt alloy) taps offer superior hardness, heat resistance, and wear resistance, making them better for tougher, harder materials and higher production rates.
How do I choose the correct drill bit size for tapping?
The correct drill bit size is crucial for creating the proper pilot hole. You can find charts online or in tool catalogs that list the recommended pilot hole diameter for each tap size and thread pitch.
What do coatings on taps do?
Coatings like TiN or TiCN increase the tap's surface hardness, reduce friction, and improve lubricity. This leads to extended tool life, better chip flow, and improved thread quality, especially when cutting harder or more abrasive materials.
Are spiral point taps suitable for all metals?
Spiral point taps are best suited for softer to medium-hard metals where chip evacuation is a concern, particularly in through-hole applications. For very hard alloys or difficult-to-machine metals, specialized taps or machining techniques might be more effective.
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